An instructor is trying to adjust the level of difficulty of a continuing education class to meet the needs of his students. After teaching the course several times and giving the students a simple evaluation questionnaire each time, he found that 12 students said the course was too easy, 84 students said the course was about right, and 3 students said the course was too hard. Test the hypothesis that the students are equally likely to think the course is too easy or hard against the two-sided alternative that the level of the course needs to be adjusted, at the 5% level of significance.
A) Null hypothesis (H₀): The students are equally likely to think the course is too easy or hard.
B) Null hypothesis (H₀): The level of the course needs to be adjusted.
C) Alternative hypothesis (H₀): The students are not equally likely to think the course is too easy or hard.
D) Alternative hypothesis (H₀): The students think the course is too easy or too hard in different proportions.